When the gate staff scanned your pass, they said: "To the left, please" or "To the right and down the steps, please" (OK, the 'please' was not said every time!
)
The left was the bridge and the right was down two flights of stairs and out across the tarmac in the usual LCC fashion. I know that Virgin Australia used this but cannot recall if QA also did. I did not use JetStar or TigerAir Australia.
@PAXboy - still standard practice with Norwegian at selected airports. Works well IMHO